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/*
* Copyright (C) 2016 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.api.tools.framework.processors.resolver;
import com.google.api.tools.framework.model.Diag;
import com.google.api.tools.framework.model.EnumType;
import com.google.api.tools.framework.model.EnumValue;
import com.google.api.tools.framework.model.Field;
import com.google.api.tools.framework.model.Interface;
import com.google.api.tools.framework.model.Location;
import com.google.api.tools.framework.model.MessageType;
import com.google.api.tools.framework.model.Method;
import com.google.api.tools.framework.model.Model;
import com.google.api.tools.framework.model.SymbolTable;
import com.google.api.tools.framework.model.TypeRef;
import com.google.api.tools.framework.model.Visitor;
import com.google.api.tools.framework.util.VisitsBefore;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* Visitor which creates the symbol table for an model. Reports errors for duplicate
* declarations.
*/
class SymbolTableBuilder extends Visitor {
private final Model model;
private final Map interfaces = Maps.newLinkedHashMap();
private final Map types = Maps.newLinkedHashMap();
private final Map> methods = Maps.newLinkedHashMap();
private final Set fieldNames = new HashSet<>();
SymbolTableBuilder(Model model) {
this.model = model;
}
SymbolTable run() {
visit(model);
return new SymbolTable(interfaces, types, fieldNames, methods);
}
@VisitsBefore void visit(Interface endpointInterface) {
// Add the interface to the map of known interfaces.
Interface old = interfaces.put(endpointInterface.getFullName(), endpointInterface);
if (old != null) {
model.getDiagCollector().addDiag(Diag.error(endpointInterface.getLocation(),
"Duplicate declaration of interface '%s'. Previous location: %s",
endpointInterface.getFullName(), old.getLocation().getDisplayString()));
}
// Build the method-by-name map for this interface, and register the method simple name in the
// method name map.
Map methodByName = Maps.newLinkedHashMap();
for (Method method : endpointInterface.getMethods()) {
Method oldMethod = methodByName.put(method.getSimpleName(), method);
if (oldMethod != null) {
model.getDiagCollector().addDiag(Diag.error(method.getLocation(),
"Duplicate declaration of method '%s'. Previous location: %s",
method.getSimpleName(), oldMethod.getLocation().getDisplayString()));
}
List allMethodsOfName = methods.get(method.getSimpleName());
if (allMethodsOfName == null) {
methods.put(method.getSimpleName(), Lists.newArrayList(method));
} else {
allMethodsOfName.add(method);
}
}
endpointInterface.setMethodByNameMap(ImmutableMap.copyOf(methodByName));
}
@VisitsBefore void visit(MessageType message) {
// Add the message to the set of known types.
addType(message.getLocation(), message.getFullName(), TypeRef.of(message));
// Build the field-by-name map for this message, and record field simple names.
Map fieldByName = Maps.newLinkedHashMap();
for (Field field : message.getFields()) {
fieldNames.add(field.getSimpleName());
Field old = fieldByName.put(field.getSimpleName(), field);
if (old != null) {
model.getDiagCollector().addDiag(Diag.error(field.getLocation(),
"Duplicate declaration of field '%s'. Previous location: %s",
field.getSimpleName(), old.getLocation().getDisplayString()));
}
}
message.setFieldByNameMap(ImmutableMap.copyOf(fieldByName));
}
@VisitsBefore void visit(EnumType enumType) {
// Add the enum type to the set of known types.
addType(enumType.getLocation(), enumType.getFullName(),
TypeRef.of(enumType));
// Build the field-by-name map for this enum type.
Map valueByName = Maps.newLinkedHashMap();
for (EnumValue value : enumType.getValues()) {
EnumValue old = valueByName.put(value.getSimpleName(), value);
if (old != null) {
model.getDiagCollector().addDiag(Diag.error(value.getLocation(),
"Duplicate declaration of enum value '%s'. Previous location: %s",
value.getSimpleName(), old.getLocation().getDisplayString()));
}
}
enumType.setValueByNameMap(ImmutableMap.copyOf(valueByName));
}
private void addType(Location location, String fullName, TypeRef type) {
String typeName = SymbolTable.getTypeNameInSymbolTable(fullName);
TypeRef old = types.put(typeName , type);
if (old != null) {
model.getDiagCollector().addDiag(Diag.error(location,
"Duplicate declaration of type '%s'. Previous location: %s",
fullName, old.getLocation().getDisplayString()));
}
}
}
